// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "content/test/blink_test_environment.h"

#include <string>

#include "base/command_line.h"
#include "base/message_loop/message_loop.h"
#include "base/run_loop.h"
#include "base/strings/string_tokenizer.h"
#include "base/test/test_discardable_memory_allocator.h"
#include "base/third_party/dynamic_annotations/dynamic_annotations.h"
#include "build/build_config.h"
#include "content/public/common/content_switches.h"
#include "content/public/common/user_agent.h"
#include "content/public/test/test_content_client_initializer.h"
#include "content/test/test_blink_web_unit_test_support.h"
#include "third_party/WebKit/public/web/WebCache.h"
#include "third_party/WebKit/public/web/WebKit.h"
#include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
#include "url/url_util.h"

#if defined(OS_WIN)
#include "ui/display/win/dpi.h"
#endif

#if defined(OS_MACOSX)
#include "base/test/mock_chrome_application_mac.h"
#endif

namespace content {

namespace {

    class TestEnvironment {
    public:
#if defined(OS_ANDROID)
        // Android UI message loop goes through Java, so don't use it in tests.
        typedef base::MessageLoop MessageLoopType;
#else
        typedef base::MessageLoopForUI MessageLoopType;
#endif

        TestEnvironment()
        {
            main_message_loop_.reset(new MessageLoopType);

            // TestBlinkWebUnitTestSupport must be instantiated after MessageLoopType.
            blink_test_support_.reset(new TestBlinkWebUnitTestSupport);
            content_initializer_.reset(new content::TestContentClientInitializer());

            base::DiscardableMemoryAllocator::SetInstance(
                &discardable_memory_allocator_);
        }

        ~TestEnvironment()
        {
        }

        TestBlinkWebUnitTestSupport* blink_platform_impl() const
        {
            return blink_test_support_.get();
        }

    private:
        std::unique_ptr<MessageLoopType> main_message_loop_;
        std::unique_ptr<TestBlinkWebUnitTestSupport> blink_test_support_;
        std::unique_ptr<TestContentClientInitializer> content_initializer_;
        base::TestDiscardableMemoryAllocator discardable_memory_allocator_;
    };

    TestEnvironment* test_environment;

} // namespace

void SetUpBlinkTestEnvironment()
{
    blink::WebRuntimeFeatures::enableExperimentalFeatures(true);
    blink::WebRuntimeFeatures::enableTestOnlyFeatures(true);

#if defined(OS_MACOSX)
    mock_cr_app::RegisterMockCrApp();
#endif

#if defined(OS_WIN)
    display::win::SetDefaultDeviceScaleFactor(1.0f);
#endif

    // Explicitly initialize the GURL library before spawning any threads.
    // Otherwise crash may happend when different threads try to create a GURL
    // at same time.
    url::Initialize();
    test_environment = new TestEnvironment;
}

void TearDownBlinkTestEnvironment()
{
    // Flush any remaining messages before we kill ourselves.
    // http://code.google.com/p/chromium/issues/detail?id=9500
    base::RunLoop().RunUntilIdle();

    if (RunningOnValgrind())
        blink::WebCache::clear();
    delete test_environment;
    test_environment = NULL;
}

} // namespace content
